/*
+ * Copyright (c) 2012,2015,2017 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder. You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Steve Reinhardt
+ * Andreas Hansson
+ * William Wang
*/
/**
* @file
* Port object definitions.
*/
-#include <cstring>
-
-#include "base/chunk_generator.hh"
-#include "base/trace.hh"
-#include "mem/mem_object.hh"
#include "mem/port.hh"
-class DefaultPeerPort : public Port
-{
- protected:
- void blowUp() const
- {
- fatal("%s: Unconnected port!", peer->name());
- }
-
- public:
- DefaultPeerPort()
- : Port("default_port", NULL)
- { }
-
- bool recvTiming(PacketPtr)
- {
- blowUp();
- return false;
- }
-
- Tick recvAtomic(PacketPtr)
- {
- blowUp();
- return 0;
- }
-
- void recvFunctional(PacketPtr)
- {
- blowUp();
- }
-
- void recvStatusChange(Status)
- {
- blowUp();
- }
-
- unsigned
- deviceBlockSize() const
- {
- blowUp();
- return 0;
- }
-
- void getDeviceAddressRanges(AddrRangeList &, bool &)
- {
- blowUp();
- }
-
- bool isDefaultPort() const { return true; }
-};
-
-DefaultPeerPort defaultPeerPort;
+#include "base/trace.hh"
+#include "sim/sim_object.hh"
-Port::Port(const std::string &_name, MemObject *_owner)
- : EventManager(_owner), portName(_name), peer(&defaultPeerPort),
- owner(_owner)
+/**
+ * Master port
+ */
+MasterPort::MasterPort(const std::string& name, SimObject* _owner, PortID _id)
+ : Port(name, _id), _slavePort(NULL), owner(*_owner)
{
}
-Port::~Port()
+MasterPort::~MasterPort()
{
}
void
-Port::setPeer(Port *port)
+MasterPort::bind(Port &peer)
{
- DPRINTF(Config, "setting peer to %s\n", port->name());
-
- peer = port;
+ auto *slave_port = dynamic_cast<SlavePort *>(&peer);
+ if (!slave_port) {
+ fatal("Attempt to bind port %s to non-slave port %s.",
+ name(), peer.name());
+ }
+ // master port keeps track of the slave port
+ _slavePort = slave_port;
+ Port::bind(peer);
+ // slave port also keeps track of master port
+ _slavePort->slaveBind(*this);
}
void
-Port::setOwner(MemObject *_owner)
+MasterPort::unbind()
{
- eventq = _owner->queue();
- owner = _owner;
+ if (_slavePort == NULL)
+ panic("Attempting to unbind master port %s that is not connected\n",
+ name());
+ _slavePort->slaveUnbind();
+ _slavePort = nullptr;
+ Port::unbind();
}
-void
-Port::removeConn()
+AddrRangeList
+MasterPort::getAddrRanges() const
{
- if (peer->getOwner())
- peer->getOwner()->deletePortRefs(peer);
- peer = NULL;
+ return _slavePort->getAddrRanges();
}
void
-Port::blobHelper(Addr addr, uint8_t *p, int size, MemCmd cmd)
+MasterPort::printAddr(Addr a)
{
- Request req;
+ auto req = std::make_shared<Request>(
+ a, 1, 0, Request::funcMasterId);
- for (ChunkGenerator gen(addr, size, peerBlockSize());
- !gen.done(); gen.next()) {
- req.setPhys(gen.addr(), gen.size(), 0);
- Packet pkt(&req, cmd, Packet::Broadcast);
- pkt.dataStatic(p);
- sendFunctional(&pkt);
- p += gen.size();
- }
+ Packet pkt(req, MemCmd::PrintReq);
+ Packet::PrintReqState prs(std::cerr);
+ pkt.senderState = &prs;
+
+ sendFunctional(&pkt);
}
-void
-Port::writeBlob(Addr addr, uint8_t *p, int size)
+/**
+ * Slave port
+ */
+SlavePort::SlavePort(const std::string& name, SimObject* _owner, PortID id)
+ : Port(name, id), _masterPort(NULL), defaultBackdoorWarned(false),
+ owner(*_owner)
{
- blobHelper(addr, p, size, MemCmd::WriteReq);
}
-void
-Port::readBlob(Addr addr, uint8_t *p, int size)
+SlavePort::~SlavePort()
{
- blobHelper(addr, p, size, MemCmd::ReadReq);
}
void
-Port::memsetBlob(Addr addr, uint8_t val, int size)
+SlavePort::slaveUnbind()
{
- // quick and dirty...
- uint8_t *buf = new uint8_t[size];
-
- std::memset(buf, val, size);
- blobHelper(addr, buf, size, MemCmd::WriteReq);
-
- delete [] buf;
+ _masterPort = NULL;
+ Port::unbind();
}
-
void
-Port::printAddr(Addr a)
+SlavePort::slaveBind(MasterPort& master_port)
{
- Request req(a, 1, 0);
- Packet pkt(&req, MemCmd::PrintReq, Packet::Broadcast);
- Packet::PrintReqState prs(std::cerr);
- pkt.senderState = &prs;
+ _masterPort = &master_port;
+ Port::bind(master_port);
+}
- sendFunctional(&pkt);
+Tick
+SlavePort::recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor)
+{
+ if (!defaultBackdoorWarned) {
+ warn("Port %s doesn't support requesting a back door.", name());
+ defaultBackdoorWarned = true;
+ }
+ return recvAtomic(pkt);
}